Elevator.



PATENTED APR. 3, 1906.

'T. B, MURRAY. ELEVATUR. APPLIULTIDI TILED 10V. 13,1905.

INVENTOR ATTORNEY WIT/(8858:

. cglinder containing liquid.

hack into the tank. In the return-conduit THOMAS E. MURRAY, OF BROGKLYN, NEW YORK.

ELEVATOR.

Specification of Letters Patent.

Patented April 3, 1906 Applicatlnn filed November 13, 1905- Serlal No. 287.958.

To mill whom, if mm/y Ira/MWIIL:

Be it known that. l, Tnomis E. Mtfnnm', a citlzcn ol the l'nitcd States, residing at Brooklyn, in the count of Kin ssnfisnss of how York; have invented a certain new and useful lniprcvement in Elevators, of

which thc following is u specification.

The invention relates to elevators for passengers; goods, &c,

7 "When elevutor-cars arc hoisted by cables, Q failure of brakes, injury to the hoisting-gear,

br'cekage of the cablefnnd various oher wellknown causes may result in their accidental fall The principle of my invent-ion is to retain the cable-hoist preferably actuated by an electric motor and to provide a positive support wholly independent of the hoistingfearfor the car, which support is contmlable during its descent, so that the car may 7 he gradually lowered .or stopped at will (lllb quick li0ist,'cuu\'cnicnb powenuud simplicity supported in fixed standards 22 and carries ing the lowering.

I show my invention here embodied in a. plunger attached to the car provided with electric h0isting-gear, which plunger enters a The ascent of e plunger when it is hoisted with the car may draw the liquid from a, tank into the cylinder. The dcsccni of the plunger, with the car, lorccsthc liquid outul' the cylinder and I arrange a valve, conl-rullnhlu either from within or wathcnt the car by lhc clcvatonai;- tcndent, which being more or loss o licncd regulates the speed of"dcsccnt of 1. 1c car oi which being aclosed stops llilll descent. While the hoisthrg-gear and descent-controlling ineans are independentcl one another; both c'oaet with the car, the operation cl the hoisting-gear bcin r necessary to misc the car before the control ing means can perform its function, and they further specifically cocci in'lhet the raising of them-er also causes the plunger to draw the necessary liquid int" she cylinder. i

A further sdvantugc of my dcviccis that it enables me'LosuhsfiLut-e electric lmistingge cr fcr hydraulic raising-gear in hydraulic elewetors without t-hrowingss'iilc the usually costly lungernnd cylinder already instillled 'and w iich in such hydraulic elevufiois reccive liquid under pressure from the pump.

'llio pump as a source cl )OWGI is not used.

This done, 1 can gclall 1; 1c advantages of l incident to electric hoisting, combined wit h all the safety incident to slow' rsising hydraulic lip aretus. V

n he accompanying drawings, Figure 1 shows the entire device applied to un clcvntOr car. Fig. 2 is a transverse section of the controllingwalve on the line a'. of Fig. 3. i Fig. 3 is a longitudinal section of said valve 1 on the line 3 y of Fig. 2.

- Similar numbers of reference indicutc like l parts. i

The elevator-cur l, which travels in the E usual shaft, has connected to it the cables 2 l and 3. Cable 2 passes over the fixed pulleys l 4 and to any suitable hoisting-drum, which is rotated by the electric motor 5 Cable 3 passes over the fixed pulleys 6 and curries the l usual counterweight 7.

To the bo'ttem of the car is connected the hollow plunger 8, which enters the vertical cylinder 9, which cylinder is connected by was 10 and 11 to the ottom ol' water-tank 1 2. ntering said tank is a pipe 13, leading from i the streeti-1nuin or any other source of wetcrisuli lygprovided with any suitable valve control ed by the lever and float 26. The urran 'emcnt of said valve and float is to be small that should the water in the tank fall below a predetermined level the llmil in dosccmllng will open the valve and admit. \\'n in? until said lr-{cl is regained. This is simply u guard device to revent the possibility ol'ilie leek hccomin cm flied. il'rdinurily Lhe'ank may belillccl hyt 1e branch pipe-14,

rovided with a suitable valve or faucet l5.

1 his to be understood, however, that thorn is no scum] expenditure of water in my alcvivv, since it merely travels from cylinder to tank and back as the device opemtvs,so that the object. of the llrmt is to guard a minst lcukawo and other accidental causes u ask i 1 w systems 7 V V The pipe ll serves to lend the supply of wutcr lo the cylinder Q, is preferably larger E than the pipe I I, and contains a c-lueclcvulvc n! any suitable consu'uction at Hj, which prevents lmckllow from cylimlcr in tank. Scaled in the pipe 11 is an oscillniling'vulvc 17, having s. circumferential recess 18, which i when suilnlalyqaln-ccrl pcrmils llow from the cylinder El to tank I2. Said valve is operutcnl b}; u toothed so nrcnt 11!, secured on the i end of its Hun. l itih said segment 1 l)ci 1 i gages the worm 2f), the shall, 21 of winch is the pulley .a. An endless cord 24 passes over said pulley, through the elevator-car, and over a fixed pulley 25. disposed in the shalt above said car. i

The operation ol' the device is as follows:

Valve 17 being closed by the meansdesct'ibed, the motor is controlled, preferably, N1 the usual way from the car to rotate the hoistingdrtnn to lift the ear by itscable 2. The plunger 8 is thus moved u nvardly in cylinder 9, and thus operates in coniunction with gravity, ii the tank 12 is at a higher elevation, to draw water from said tank into said cylinder. When the ear is to be lowered, the hoistingear is operated in the ordinary manner to all bw the cable 2 to unwind, and the attendant in the car by means of the cord 24 opens the valve 17, so as to allow the water forced out of the cylinder by the descending plunger to pass again into tank 12. By opening the ,valve in this way more or less the car can be caused to descend with greateror less rapidity, or by closing the valve it can be stopped at any desired point in its descent. Instead of controlling the vabe 17 by the cord 24 within the earl may do so by-crank 27 on the valve-shalt. l

By the aforesaid construction it will be seen that the function of the electric motor is simply to hoist the ear aml that the drum or other means of winding the cable associated therewith need not be provided unless de sired with any brake or other device for arresting the car in descending. "1 tether such brake is provided or not the plunger and pisloll serve positively to support and to control the deseent. and so to prevent any possibility ol the ear l'alling because of accident to motor or hoistinggear. It is to be noted that the cylinder 21 isnot a niotor e \:linder and that no pump is eonibined with it to cause the ear to be raised h bydraulie pressure therein in praeti're I may also use the electricallyactuated hoisting-gear in the ordinary manner. both raisingand lowering the earthrough its eontrol, and employ my present device to determine some lixed and delinite speed of deseent. ln sueh ease the cord for operating the valve I? from within the car may be omitted. and the valve. 17 may be set by the crank 27, for example, to some select-ed degree olopening wbieh will al ow escape of water to regulate the descent of the car at only the predetermined speed, as so many leet per minute. The presence of my invention will in no wise interfere with the speed of electric hoisting, since the llow-ol water into the cylinder through the pipe 1U, purposely made large in diameter, will be free and un-. impeded.

1. The combination with an elevator-car and hoisting-gear therefor, of a vertical rigid support secured to said car, a c linder containing liquid disposed below sai car and rel l l l l l l l cylinder through said ceiving said support, a liquid-escape conduit connnunieating with said cylinder and means for regulating the escape of liquid from said conduit upon the descent of said car.

2. The combination with an elevator-car and hoisting-gear therefor, of a closed liquidreccptacle, a tank, means positively actuated by said our for causing a tlow of liquid from said tank to said receptacle on the ascent of said ear and for forcing said liquid out of said receptacle and into said tank on the descent of said car and means for controlling the cs cape of liquid from said receptacle to said tank.

3. The combination with an elevator-ear and hoisting-gear therefor, of a vertical su porting-phnlger, a cylinder containing liquid disposed below said car and receivim said plunger, a tank communicating with said cylinder and means controllable within said car forremilating the escape of liquid from said cylint er to said tank.

4. The combination with an elevator-car and hoisting-gear therefor, of a. vertical supporting-plunger, a cylinder containing liquid disposed below said car and receiving said plunger, a tank, a duct between said tank and cylinder, at check-valve in said duct constructed to prevent llow of liquid from cylinder to tank, a second duct between said duct and said cylinder and a 'valve for re ulating liquidlow tlu'ough said last-named net.

5. The combination with an elevator-car and hoisting-gear therefor, of a vertical su porting- :lnnger, a cylinder containing liquid disposed below sait ear and receiving said plunger. a tank. a duct between said tank and 'elinder, a cheek-valve in said duet con structed to prevent llow at liquid from cylinder to tank. a second duct between said tank and said eylinder, a valve for regulating liquid through said last-named duct and means controllable within said ear for aetuat ing said valve.

6. The combination with an elevator-car and hoisting-gear therefoiyol a vertieal sup porting-plunger. a cylinder containing liquid disposed below and receiving said plunger, a tank, a duct between said tank and said cylinder, a check-valve in said duet constructed to )revent flow of liquid" front cylinder to tan i, a second duct between said tank and said evlinder, a valve for regulating liquidllow through said last-named duet, a racksegment carried by said valve-stem, a worm engaging with said segment and an endless cord for actuating said worm and extending within said car. i

7. The combination with an elevator-car and hoisting gear therefor, of a hollow vertical supportiiig-phni 'er, a cylinder below said car containing liquid and receiviu said plunger, a tank, a duct between said tank and said cylinder, and a. valve in said duct.

IZC

S The P-UIHblHHLlOIl with an elevator-ear :uul hulsLing-gvur therefor, of a. vertical supmfliug-pluugm', a cylinder below said our eumnining l'zquld and reeelving said plunger, hulk, menus l'er delivering a supply of lk uid Lu su'ul tank, a duet between' said tauli and said nylimler, means for preventing low thruugh 51ml duet from cylinder {0 tank, a

t second (luct between tank and cylinder and R valve in sad last-manned duct.

l In testimony whereof I have alilxed my E signature in presence of two illnesses.

i THOMAS E. MURRAY.

1 W ltnesses:

; WM. H. SIEGMAN,

3 PARK BENJAMIN, Jr. 

